\hbox{%
	\def\classlist{David/Salomon, Michael/Downes, Frank/Mittelbach, David/Carlisle,
		David/Kastrup, Heiko/Oberdiek, Till/Tantau, Donald/Arseneau, Joseph/Wright,
		Hans/Hagen, Taco/Hoekwater, Hartmut/Henkel, Robin/Fairbain, Ulrike/Fischer,
		Ulrich/Diez}
	% Let Will's processing function be \do:
	\def\do#1/#2,{%
		\ifx\do#1\else
			\noexpand\elt{\cpttrimspace{#1}}{\cpttrimspace{#2}}%
			\expandafter\do
		\fi
	}%
	\edef\classlist{\expandafter\do\classlist,\do/,}%
	\aftergroupexecute{\def\includelater{Will Robertson}}
	\expandafter\aftergroupexecute\expandafter{\expandafter\def\expandafter
		\somemasters\expandafter{\classlist}}
}
%\show\includelater
\show\somemasters
